Rose continued with her ministrations seeing how well the Doctor liked it, not to mention that it brought her some peace too. She wasn't sure if they could especially if the Master had been here a long while and had been taking over by hypnotic suggestion.
Caitlyn wasn't at all certain how to talk sense into Brits neither. It seemed that sometimes when someone had a clear idea in their head they refused to listen to sense or to someone else, except for when it was close to being too late or just that second too late.